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Using RG we investigate the non-equilibrium relaxation of the (Cardy-Ostlund)2D random Sine-Gordon model, which describes pinned arrays of lines. Itsstatics exhibits a marginal ($\theta=0$) glass phase for $T<T_g$ described by aline of fixed points. We obtain the universal scaling functions for two-timedynamical response and correlations near $T_g$ for various initial conditions,as well as the autocorrelation exponent. The fluctuation dissipation ratio isfound to be non-trivial and continuously dependent on $T$.Comment: 5 pages, RevTex, Modified Versio

Aging in the Glass Phase of a Two-Dimensional Random Periodic Elastic System